Suspension of trolley-wires.



PATEN-TED SEPT. l5, 1903. M. T. A. KUBIERSGHKY & P. HERKNER.

SUSPENSION 0F TROLLEY WIRES.

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UNITED STATES Iiatented September 15, 1903.]

PATENT OFFICE. i v

MARTIN T. A. K UBIERSCHKYAND PAUL HERKNER, OF BERLIN,

` GERMANY.

SUSPENSION OF TROLLEY-WIRES.

SPECIFICATION forming part of Letters Patent No. 738,919, datedSeptember 15, 1903.

Application iiled June 8, 1903. Serial No. 160,611. (No model.)

leyWires,-of which the following is a speci-- fication.

The present invention relates to the suspension of electrictrolley-wires,vand has for its object to provide a flexible suspender towhich the ends of the wire may be securely 'and adjustably connected andreadily disconnected.

The invention will be readily understood upon reference to the followingdescription and the accompanying drawings, forming a part of thisspecification, in which- Figure 1 is a part elevation and part sectionalview of a connection-ear embodying one form of our invention. Figs. 2,3, and 4 are cross-sections thereof, taken on the lines 2 2, 3 3, and 44 of Fig. 1; and Fig. 5 is a part elevation and part sectional view of asectionf insulator embodying our invention.

The connection-ear shown' in Figs. 1 to 4 comprises a continuous trough1, having a circular groove 2 therein ladapted to receive the ends ofthe trolley-wire 3 and integrally connected on each side of a centralopen space 4 to a bridge portion 5, provided with a threaded hole 6 forengagement with the usual insulated suspension-bolt. The metal of thetrough portion 1 is gradually reduced from its connection with bridgeportion 5 toward its respective ends in order to render the ear moreiiexible, and at the ends the sides of the trough are extended upwardand.

united to form closed rings 7. The lower surface 8 ofthe bridge portionslopes outwardly toward the bottom of the'trough to form key-seats'.

The means for securing the ends of the wire in iixed relation with theear comprises pairs of keys 9 and 10, one of which, key 10, is providedwith teeth or corrugations 11, adapted'- to. engage corresponding teethor corrugations 12 in the side of the wire, and both keys are arrangedwith their thinner ends directed outward beneath the sloping undersurface of the bridge portion 5. According to this arrangement the endof the wire 3 may be placed in its desired position with relation to theear and key 9 driven outward, forcing the toothed key 10 into permanentengagement with the wire and wit-hout disturbing the relative positionof the wire to 'the ear. Should the wire tend to draw outward inservice, either one or both of the keys 9 and 10 will be drawn with itand correspondingly increase the frictional resistance.

The ring'portions 7 at the ends of the ear are provided with means forbinding the trolley-wire in contact with the bottom of the trough, and,as shown inthe drawings, this means consists of a single key 13, Vdrivenin between the inner surface of the ring and the wire and bent up at itsend to prevent its workin g loose.

1n the section-insulatorshown in Fig. 5the metallic end portions 15 and16 are mechanically connected by an insulating-strut 17, provided at itscenter with means for attachment to the guy-wire, the insulatedturnbuckle-bolts 18 19, and the runner 20. The metallic end portions 15and 16 have open grooves for the reception of the ends of thetrolleywire, with their outer ends provided with vclosed ring portions21, their inn'er ends and 16 is reduced toward their outer ends torender them flexible, so that the trolley-wire carried thereby will .notbe abruptly iieXed at the ends of the clamping-Suspenders.

When it is desired to take up the slack in the wire, stretching-clampsare applied in the usual manner and the'pairs of attaching-keys 9 10 or24 25 removed and replaced, with the toothed key advanced one or morenotches on the wire and the plain upper key replaced and driven home,and in case it is desired to slacken the wire the toothed key will beaccordingly stepped back one or more notches on the wire.

We do not desire to restrict ourselves to the particular form orconstruction of parts shown and described, since it is apparent thatthey may be changed and modified without departing from our invention.

What we claim as new, and desire to secure by Letters Patent of theUnited States, is-

1. The combination of a trolley-wire snspender having a key-seat and agroove for the reception of an end of the Wire, and a pair of keyslocated between the wire and said keyseat and adapted when displaced bythe tension of the wire to exert increased clamping eiect thereon.

2. The combination of a trolley-wire suspenderhavinga key-seatand agroove forone end of the wire, and a pair of keys located between lhewire and said seat, one of said keys being provided on one side withteeth or corrugations to engage said wire and the other key having plainsurfaces and adapted to be driven between said seat and the first key.

3. The combination of a trolley-wire snspender having a key-seat and agroove for an end of the Wire, and a pair of similarly-directed keyslocated between the wire and said seat and adapted when either or bothis displaced by the tension of the Wire to exert increased clampingeffect thereon.

4. The combination of a trolley-wire snspenderhavingr an end graduallyreduced in cross-section and provided with a groove for an end ofthewire, a key-seat, a pair of similarly-directed keys located betweenthe wire and said seat, and means for holding the outer end of saidsuspender in contact with the wire.

5. The combination of a trolley-wire ear having a grooved trough for thereception of the ends of the wire, a bridge portion provided on itsunder surface with key-seats, and integrally connected at its ends withsaid trough with an intervening opening, and pairs of outwardly-directedkeys located between the ends of the wire and said seats.

In Witness whereof we have hereunto set our hands this 27th day of May,1903.

MARTIN T. A. KUBIERSCIIK Y. PAUL HERKNEK.

Witnesses:

WOLDEMAR HAUPT, HENRY HAsPER.

